EP0871413B1 - Einrichtung zum stabilisieren von angioplastisch behandelten teilbereichen einer gefässwand (stent) - Google Patents
Einrichtung zum stabilisieren von angioplastisch behandelten teilbereichen einer gefässwand (stent) Download PDFInfo
- Publication number
- EP0871413B1 EP0871413B1 EP96942165A EP96942165A EP0871413B1 EP 0871413 B1 EP0871413 B1 EP 0871413B1 EP 96942165 A EP96942165 A EP 96942165A EP 96942165 A EP96942165 A EP 96942165A EP 0871413 B1 EP0871413 B1 EP 0871413B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stent
- axial direction
- regions
- shaped
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/88—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/958—Inflatable balloons for placing stents or stent-grafts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0095—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof radioactive
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0067—Means for introducing or releasing pharmaceutical products into the body
Definitions
- Intraluminal vascular prostheses as usually used as a stent Plaque can be called from the lumen of the vessel keep away and have a vascular wall support effect. Consequently becomes a hemodynamically adequate vascular lumen in the long run guaranteed.
- the vessel wall itself is usually elastic trained and the supporting forces to be applied must in each case Antagonize the restoring forces of the elastic vessel wall.
- the stents vary in their materials, designs and dimensions. Differences in the implantation mechanism one is self-expandable and balloon expandable (balloon-expandable) stents. The one on a balloon catheter (delivery system) fixed stent is over a Guide spiral inserted into the stenosed vessel lumen, then the implantation mechanism is triggered (in the case of a The balloon is "balloon-expandable” with the help of a Fluid pressure system for a given period of time in Inflated seconds range), then the "Delivery System "removed from the segment of the vessel while the stent is its Functions as a lifelong intraluminal vascular prosthesis.
- a known construction of a stent results, for example from US Pat. No. 5,383,892, in which at least one flexible, elastically expandable, cylindrical section and rigid, plastically expandable cylindrical parts or end areas made of different materials alternating with each other are connected.
- a vascular prosthesis has become known from US-A 5314472, which is made up of a wire bent in wave form.
- the vascular prosthesis has a middle part and two end parts with the winding density of the wire in the end parts is higher than in the middle section, which means that the Vascular prosthesis is achieved in the vessel.
- the higher winding density in the end parts is due to a lower amplitude of the Turns of the wavy bent wire reached.
- stents are for the treatment of complex or long-distance stenoses not optimally suited, due to technical difficulties with stent protrusion there is increased inflexibility, as well as higher restenosis rate to be watched.
- Orientation ensured only by angiography, whereby this placement is complicated by the heartbeat.
- Implantation of multiple stents to revascularize one complex or long lesion what with relatively high restenosis rates is associated as the mechanical and thrombogenic Condition within such stent chains is not assured.
- multiple stent implantation adjoining "normal" vascular structures an inadequate mechanical and exposed to thrombogenic trauma.
- the invention now aims to provide a stent device initially mentioned kind to further develop such a Vascular prosthesis both simple and complex or long-distance Can adequately cover stenosis, being simultaneous Adaptation to the longitudinal coverage distance and minimization mechanical, thrombogenic and whatever, for revascularization with the help of stent implantation unavoidable traumas to the neighboring ones "normal" vascular structures is achieved.
- the device according to the invention is used to achieve this object essentially in that the middle areas a higher surface or winding density and in expanded State have higher compressive strength than the terminal ones Areas and that staggered areas in the axial direction Stents with differently curved or different ones Supporting elements having a winding spacing are provided are and that the support element or elements of rod-shaped convoluted material with over the axial length of the stent constant material diameter and / or material cross section are formed. Because the middle areas a higher surface or winding density and in expanded State have higher compressive strength than the terminal ones Areas become different over the axial length strong forces of the elastic vessel wall in a suitable manner antagonized, making it possible to attach the stent to the respective To adapt needs optimally.
- the stent can be made from a single elongate Support element, for example a wire or a plurality be constructed of support elements, this training is advantageously taken so that a plurality of support elements articulated together in the axial direction is.
- a stent constructed from a single wire can be in axial Direction in areas with different radial pressure forces be divided. For a multiple stent of interconnected support elements determine each one different radial pressure forces. It is an advantage the training is made so that a variety of different shaped or convoluted sections over each a connecting member extending in the axial direction are connected. This is a high level of flexibility between the individual support elements and thus a good one Maneuverability guaranteed when inserting the stent.
- a plurality of support elements is particularly advantageous coaxially and successively in the radial direction arranged.
- the training is made such that the material of the support elements with pharmacologically active substances and / or radioactive isotopes doped is. Due to the different in the axial direction Area and winding densities also include the amount of doping pharmacologically active substances or radioactive Isotopes differ in the same sense, and it can Doping in certain areas according to the area or Winding thickness can be concentrated.
- FIG. 1 shows a stent consisting of a single Wire is constructed
- Fig.2 a stent consisting of several
- Fig.3 a stent in the middle is made up of a single wire and ends with further supporting elements is connected.
- the stent denoted by 1 in FIG. 1 points in the axial direction adjoining sections a to e.
- the subareas a and e are relatively small Surface or winding density of the support wire 2, so that in this section after expanding to the desired one Diameter 3 a predetermined restoring force or support force is achieved.
- the support wire 2 is too narrow Mesh wrapped, resulting in a higher rigidity even in expanded condition is guaranteed.
- FIG. 2 there is one stent 4 with several Support elements 5-9 shown, which is analogous to that in Fig.1 described stent is divided into sub-areas a to e.
- sections a and e are relative wide-meshed support elements 5 and 9 and the sub-areas b, c and d given by relatively narrow-meshed support elements 6, 7 and 8, which in turn results in a higher elastic restoring force in the inner sections b, c and d and a lower one Support strength in the terminal areas results.
- the Support elements 5 to 9 are each with a connecting piece 10 connected.
- Fig. 3 shows a stent 11, which is a combination of the in Figures 1 and 2 described stents 1 and 4. Also this stent is like the previous ones in sections a to e structured, one consisting of a single wire 12 close-meshed subsection b, c and d with wide-meshed Subareas a and e, which consist of the support elements 5 and 9, are each connected to a connector 10. It in turn there are higher restoring forces in the partial areas b, c and d as in the terminal sub-areas a and e.
- the individual stents described differ with regard to their properties, the stent 1 in FIG. 1 being excellent Maneuverability and adaptation to the movement of the blood vessels, the stent 4 in FIG. 2 has a minimal one Shortening when expanding shows and the stent 11 in Figure 3 a has very good corner stability.
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Description
Claims (6)
- Einrichtung zum Stabilisieren von stenosierten bzw. angioplastisch behandelten Teilbereichen einer Gefäßwand, bestehend aus einem aufweitbaren Stützteil als Stent (1,4,11), welcher . als rohrförmiger Körper ausgebildet ist, wobei die Wandung aus wenigstens einem in Umfangsrichtung mäanderförmig oder zick-zackförmig geformten Tragelement (2,5,6,7,8,9,12) besteht, dessen oder deren Flächen- bzw. Windungsdichte bei gleichem Material in axialer Richtung des Stents unterschiedlich ist, und daß das oder die Tragelemente in Bereichen (a,b,c,d,e) mit verschiedener Flächen- bzw. Windungsdichte bei auf im wesentlichen über die axiale Länge gleichem aufgeweiteten Durchmesser (3) unterschiedliche radiale Druckkräfte aufweisen, dadurch gekennzeichnet, daß die mittleren Bereiche eine höhere Flächen- bzw. Windungsdichte und in aufgeweitetem Zustand höhere Druckfestigkeit aufweisen als die endständigen Bereiche und daß in axialer Richtung gestaffelte Bereiche (a, b, c, d, e) des Stents (1,4,11) mit unterschiedlich gekrümmten oder einen unterschiedlichen Windungsabstand aufweisenden Tragelementen (2,5,6,7,8,9,12) vorgesehen sind und daß das oder die Tragelemente (2,5,6,7,8,9,12) von stabförmigem gewundenen Material mit über die axiale Länge des Stents (1,4,11) gleichbleibendem Materialdurchmesser und/oder Materialquerschnitt gebildet sind.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß eine Mehrzahl von Tragelementen (5,6,7,8,9,12) in axialer Richtung gelenkig miteinander verbunden ist.
- Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine Mehrzahl von unterschiedlich geformten bzw. gewundenen Teilbereichen (5,6,7,8,9,12) über jeweils ein sich in axialer Richtung erstreckendes Verbindungsglied (10) verbunden ist.
- Einrichtung nach einem der Ansprüche 1,2 oder 3, dadurch gekennzeichnet, daß eine Mehrzahl von Tragelementen koaxial und in radialer Richtung aufeinanderfolgend angeordnet ist.
- Einrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Material der Stützelemente (2,5,6,7,8, 9,12) mit pharmakologisch wirksamen Substanzen und/oder radioaktiven Isotopen dotiert ist.
- Einrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Stent (1,4,11) zur Plazierung auf einen an sich bekannten Angioplastie-Ballon-Katheter mit in axialer Richtung verschieden steif ausgebildeter Ballonwand aufgeschoben ist.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT67195U | 1995-12-11 | ||
AT67195 | 1995-12-11 | ||
AT671/95U | 1995-12-11 | ||
PCT/AT1996/000243 WO1997021399A1 (de) | 1995-12-11 | 1996-12-09 | Einrichtung zum stabilisieren von angioplastisch behandelten teilbereichen einer gefässwand (stent) |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0871413A1 EP0871413A1 (de) | 1998-10-21 |
EP0871413B1 true EP0871413B1 (de) | 2001-08-22 |
Family
ID=3496757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96942165A Expired - Lifetime EP0871413B1 (de) | 1995-12-11 | 1996-12-09 | Einrichtung zum stabilisieren von angioplastisch behandelten teilbereichen einer gefässwand (stent) |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0871413B1 (de) |
AU (1) | AU1131697A (de) |
DE (1) | DE59607550D1 (de) |
WO (1) | WO1997021399A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6287336B1 (en) | 1995-10-16 | 2001-09-11 | Medtronic, Inc. | Variable flexibility stent |
EP0884029B1 (de) | 1997-06-13 | 2004-12-22 | Gary J. Becker | Expandierbare intraluminale Endoprothese |
US6533807B2 (en) | 1998-02-05 | 2003-03-18 | Medtronic, Inc. | Radially-expandable stent and delivery system |
US5935162A (en) * | 1998-03-16 | 1999-08-10 | Medtronic, Inc. | Wire-tubular hybrid stent |
US6248122B1 (en) * | 1999-02-26 | 2001-06-19 | Vascular Architects, Inc. | Catheter with controlled release endoluminal prosthesis |
EP1103234B1 (de) * | 1999-11-23 | 2007-01-24 | Sorin Biomedica Cardio S.R.L. | Verfahren zur Übertragung radioaktiver Stoffe auf Stents in der Angioplastie und Bausatz |
ATE284183T1 (de) * | 1999-12-21 | 2004-12-15 | Imperial College | Vaskuläre stents |
EP1284683B1 (de) | 2000-05-22 | 2011-08-10 | OrbusNeich Medical, Inc. | Selbstexpandierbarer stent |
US7846198B2 (en) | 2002-12-24 | 2010-12-07 | Novostent Corporation | Vascular prosthesis and methods of use |
US20050165469A1 (en) * | 2002-12-24 | 2005-07-28 | Michael Hogendijk | Vascular prosthesis including torsional stabilizer and methods of use |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2026604A1 (en) * | 1989-10-02 | 1991-04-03 | Rodney G. Wolff | Articulated stent |
US5314472A (en) | 1991-10-01 | 1994-05-24 | Cook Incorporated | Vascular stent |
FR2683449A1 (fr) | 1991-11-08 | 1993-05-14 | Cardon Alain | Endoprothese pour implantation transluminale. |
-
1996
- 1996-12-09 WO PCT/AT1996/000243 patent/WO1997021399A1/de active IP Right Grant
- 1996-12-09 DE DE59607550T patent/DE59607550D1/de not_active Expired - Lifetime
- 1996-12-09 EP EP96942165A patent/EP0871413B1/de not_active Expired - Lifetime
- 1996-12-09 AU AU11316/97A patent/AU1131697A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP0871413A1 (de) | 1998-10-21 |
DE59607550D1 (de) | 2001-09-27 |
AU1131697A (en) | 1997-07-03 |
WO1997021399A1 (de) | 1997-06-19 |
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